Siemens PLC Learning note 18-(with parametric FC programming)

With parameter FC, when editing the function, define the formal parameter in the local variable declaration table, and use the virtual symbolic address in the function (FC) to complete the program writing.

Here's a simple example of how to write a parameter FC function.

This example completes the programming of a mathematical formula: Y = (X + 5) * 11/5;

The procedure is as follows:

The FC mathematical formula is written as follows (internally defined input parameter variables: x and output parameter variable y)

This program code can be downloaded here.

Siemens PLC Learning note 18-(with parametric FC programming)